The reigning champion will miss 33rd edition of the Miami Open presented by Itaú (March 22-April 2) due to a right elbow injury.
The five-time former champion fell to Nick Kyrgios 4-6, 6-7 (3) in the fourth round of the BNP Paribas Open, an ATP Masters 1000 event in Indian Wells.
Djokovic earned his 300th ATP World Tour Masters 1000 victory, beating no.31 seed Juan Martin del Potro 7-5, 4-6, 6-1.
Novak and Viktor saved one match point en-route to a 5-7, 6-1, 11-9 victory over Pierre-Hugues Herbert and Nicolas Mahut. They face Klaase/Ram in quarter-finals.
The defending champion goes on to face no.31 seed Juan Martin del Potro for a place in the ATP Masters 1000 event last 16.
Nole and Viktor needed 66 minutes to reach the second round of the BNP Paribas Open…
Novak will begin title defence in Indian Wells against either Kyle Edmund (GBR, ATP #46) or Gastao Elias (POR, ATP #95) in round two.
Novak is heading to Indian Wells where the first ATP World Tour Masters 1000 event of the season, the BNP Paribas Open, begins on March 9.
Novak advanced past the Argentine 4-6, 6-4, 6-4 in two hours and 38 minutes to move to 12-4 in their ATP Head2Head series.
The top seed eliminated Martin Klizan 6-3, 7-6 (4) to reach the second round of the ATP World Tour 500 tournament in Mexico.